Sewing-machine.



No. 788,828. PATBNTED AUG. 18, 190.8. G. H. DIMoND. SEWING MACHINE. APPLICATION FILED PEB. 27, 1903. )l0 MODEL 8 SHEETS-SHEET 1.

8 SHEETS-SHEET 2.

PATBNTBD AUG. 1s, 1903. G. H. DIMoND. SEWING MACHINE. APPLICATION FILED PEB. 27, 19032 1HE wams persas co. pHoro-umn., wAsmNc-Ton. D. c.

l11o MODEL.

W/ TNESSES:

No. 736,828. PATENTED AUG. 18, 1903.

G. H. DIMOND.

SEWING MAGHINE. APPLIOATION FILED PEB. 27. 1903.

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8 SHEETS-SHEET 3.

PATENTEI) AUG. 18, 1903.

G. H. DIMOND. SEWING MACHINE. APPLIUATION FILED FEB. 27, 1903.

8 SHEETS-SHEET 4.

N0 MODEL.

/NVENTOR PATEN-TED AUG. *I 8, l 903.

G. H. DIMOND. y SEWING MACHINE. ATPPLIOATION FILED I'B. 27. 1903.

N0 MODEL.

8 SHEETS-SHEET 5.

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/NVENTOH W/TNESSES PATENTBD AUG. 18, 1903.

" G. H. DIMOND.

SEWING' MACHINE.

APPLICATION rum) rma. 21,'1903.

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M w W/ 6% No. 736,828. l PATENTED AUG. `18, 1903.

l G. H. DIMOND.

SEWING MACHINE.

APPLICATION FILED PEB. 27. 1903.

I No MODEL. g a SHEETS-SHEET 7.

iiimiimm PATENTED AUG. 18, 1908.

G. H..DIMOND. SEWING MACHINE.v APPLICATION FILED P5127, 1903.

N0 MODEL.

WTNESSES' No. 736,828. Patented August 18,1903.

UNITED STATES` PATENT OFFICE.

GEORGE I-IfDIMOND, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO WHEELER du WILSON MANUFACTURING COMPANY, OF BRIDGE- PORT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

SEW|NG"`MACH|NE.

SPECIFICATION forming part ofV Letterslatent No. 736,828, datedlAugust 18, 1903.

Application led February 27, 1903. Serial No. 145,302. (No model.)

To @ZZ whom it may concern:

Be it known that I, GEORGE H. DIMOND, a citizen of the United States,residing'at Bridgeport, in the county of Fairfield and State of Connecticut, have invented a certain new and useful Improvement in Sewing-"Machines, of which the following is a full, clear, and exact description. Y

This invention relates to stitch-forming mechanism for sewing-machines; and its object' is to provide a machine for making what is known as the triple stitch, used in the manufacture of gloves, dac., and illustrated in Patent No. 708,467, granted September 2, 1902.

The needle is given the usual vertical reciprocation and is carried in a gate which is given lateral vibration, so that in forming a seam three complete interlocked and practically superposed stitches are 'made between each pair of needle-punctures, or, in other words, each stitch is composed of three coterminous stitches, while the material is moved in one direction only and advanced only as the third of the triplet of stitches is made. As in the patent referred to, so here the object of the triple stitehis to provide a tight and strong seam of great elasticity in order to yield to excessive strains, as in driving, without rupturing.

The invention is herein vshown and described as applied to two forms of sewing-machines, one, Figures 1 to l5, wherein the needle is used in connection with the feeding of the material, and the other, Figs. 6 to 10, wherein the material feed-motion is independent of the needle; but the invention is not thus limited. A

In the accompanying drawings, illustrating the invention, in the several figures of which like parts are similarly designated, Fig. 1 is a front end elevation of a needle-feed sewingmachine, the face-plate being removed. Fig. 2 is a side elevation. Fig. 3 is a bottom plan view. --Fig. A is a top plan view; and Fig. 5 is a section taken in the plane of line A B, Fig. 2. Fig. 6 is a front end elevation of a sewing-machine with a modified feed-motion, the face-plate being removed. Fig. 7 is a side elevation. Fig. 8 is a bottom plan view.

Fig. 9 is a top plan view; and Fig. 10 is a section taken in the plane of line C D, Fig. 9.

ample, the under-thread mechanism-are of the well-known Wheeler tin lVilson sewingmachine construction.

1 is the usual bed-plate, surmounted by the overhanging arm 2.

3 is a gate pivoted to the overhanging arm 2 by screws 4:, and mounted to reciprocate within said gate is a needle-bar 5, actuated in the usual manner by a link 6, operatively connected with the driving-shaft 7 (shown in dotted lines, Fig. 2) in the usual or any approved manner.

8 is a pitman, one end of which is pivoted to an arm 9, extending from the gate 3, while its opposite end is pivoted to a slide-block 10, operatively mounted in the usual manner within a grooved segment-lever 11, pivoted at 12 in the overhanging arm 2.

13 is a gear-wheehihereinafter designated a cam-gear, journaled upon a stud 14, tapped within the cover-plate 15, which incloses an opening 16 in the arm. The lower end of the segment-lever 11 is provided with a roller-stud 17, which projects through an opening 18 in said cover-plate and is engaged by a cam-groove 19, formed within the face of said gear-wheel 13, whereby said segmentlever 11 will be intermittently oscillated and through its connection with the gate 3 impart an intermittent oscillatory movement to the needle 20 in a direction approximately parallel with the line of the seam, or, in other words, in the direction of the feed of the work.

rThe cam-gear 13 receives its movement from ,a spur-pinion 21, faston the hub of a bevelpinion 22, which latter is journaled upon a stud 23, tapped within the cover-plate 15, and

intermeshing with said bevel-pinion 22 is a bevel-pinion 24, fast on the driving-shaft 7. The relative proportions of these toothed .wheels are Vsuch that the shaft 7 will make three revolutions while the camgear 13 is 9 making one revolution, and the contour of the cam-groove` 19 is such that theneedle-bar gate 3 will be oscillated during the first and second revolutions of. said shaft while the needle 20 is raised out of the material, and

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upon the third revolution said gate will be oscillated while the needle is down and in the material, so as to effect the feeding of the material. In Fig. 1 the needle-bar is shown at the downward limit of its vertical stroke and at the conclusion of the oscillatory movement of the gate 3 to effect the feeding of the mat ferial. After the needle has been withdrawn from the materialand previous to taking they next stitch the `gate 3 will be oscillated toward the right, Fig. 1, to position the needlebar and needle, as shown in dotted lines at 25, in which position said gate will remain until the needle has been withdrawn from the material after completing the first stitch of the series. The gate 3 is then oscillated toward the left hand before the needle descends to the position first occupied, and a second stitch is taken. After the needle has been withdrawn from the material at the completion of the second stitchand previous to the descent of the needle for the third stitch, said gate 3 is again oscillated toward the right hand to the position occupied for the first stitch of the series, as indicated in dotted lines at 25, whereupon the needle descends for the third stitch, during the formation of which and while said needle is in the material said gate is again oscillated toward the left hand of the figure, thereby feeding the material being stitched. It will be observed that there is no feeding or advancing of the materialdurin g the formation of the first two of the three stitches used to form the triple stitch, and hence the completed seam is composed of a series of triplet stitches of great strength and elasticity. In order to prevent the needle-puncture in the material from being distorted and also to relieve the needle of unnecessary lateral strain'during the feed movements, means are provided for slightly raising the cloth presser during the feed movement, a's follows:

26 is a spring-depressed presser-bar provided with a lifting-collar 27 and presserfoot 28 of any suitable form.

29 is a link the upper end of which is pivotally connected to a lever 30 and its lower end pivoted to a collar 31, loose upon the presser-bar 26. I

32 is a springinterposed between thecollar 31 and the lifting-collar 27.

The lever 30 is pivoted at 33 to the overhanging arm and is connected by a rod 34 at its rear end with a lever 35 on a rock-shaft 36, pivoted beneath the bed-plate. Said lever 35 carries a roller-stud 37, which is engaged by a cam 38, fast on a short counter-shaft 39, journalcd within a bracket 40, secured tothe under side of said bed-plate. Also fast on said counter-shaft is a spur-gear 41, which meshes with a pinion 42, fast on the loop-takeractuating shaft 43. The gear 41 and pinion 42 are proportioned similarly to the gears which actuate the segment-lever 11, so that the movements of the lever 35 will be in proper timo with the feed movements, the contour movement the spring 32 restores the collar to its normal position, so that the presser-bar is no longer engaged by it, but is free to move down through it for introducing and removing the material.

In Figs. 6 to 10, inclusive, the invention is shown in connection with a sewing-machine having means for feeding the material independent of the needle-actuating mechanism, and the parts retained in this machine from the machine shown in Figs. 1 to 5 are similarly designated, while the changes are indicated as follows: The needle-bar gate is oscillated only when the needle is withdrawn from the material, and the cam-gear 44 has a cam-groove 45 of the proper contour to effect this movement. On the hook shaft 43 is mounted a gear-wheel 46. A counter-shaft 47 is arranged in a bracket48, fast on theunder side of the bed-plate, and has fast to it a gear-wheel 49, providedwith acam-groove 50 in its face, and this cam-groove is of such contour that the feed-bar, through connections presently described, will be actuated only at every third stitch, so as to feed the material, as previously mentioned. 5l is a short rockshaft mounted in suitable bearings 52 and having an arm 53, provided with a roller 54, which enters the groove 50 in the gear-wheel 49. This `rock-shaft 51 is provided with the usual arcuate stitch-regulatin g lever 55,which is engaged by the usual stitch-regulating link 56, which in turn is connected with an arm 57 on a shaft 58, mounted in bearings 59 on the under side of the machine-bed. The shaft 58 has an arm 60 adj ustably secured to it, and to this arm is pivoted one end of the feed-bar 61, with a return-spring 62, fastened to the feed-bar and some stationary part of the machine. The other end of the feed-bar is engaged by a roller 63 on an arm 64 of a rockshaft 65, mounted in bearings 66 on the under side of the machine-bed, and this rockshaft is provided with an arm 67, which'has a roller 68, engaged bya cam 69 on the outer'end of the shaft 47. The cam 69 serves to rock the shaft 65 and by actuating the arm 64 transmits the rising-and-falling motion to the feed-bar, while the arm 60 and spring 62 impart the back-and-forth motion thereto. The spring 62 also serves to keep the feed-bar depressed. The presser-foot shown is of the usual roller variety mounted upon a springdepressed presser bar. As a means for lifting the presser-foot there is used a spring-elevated rod 70, which is connected with the rear end of the lever 30 and projects through the bed- IOO IIO

masas plate of the machine and isprovided with an adj usltable sleeve 71,* which` fcarries a roller 72. The shaft 47 is provided with a cam 73,` which coperates with the roller 72 to raise the rod 70, and consequently vibrate the lever 30, andthe forwardy end of saidlever 30` engages the lifter-collar 27, fast on the presserbar. By substituting "in thecamgear 44 a cam-groove of the contour of the groove 19 in Fig. 2 la compound feed-movement will be provided wherein both the needlebarand the feed-bar will be conjointly actuated to advance the material. Otherwise than as stated theoperation ofthe stitch'- forming mechanism in the modified machine shown in Figs'. 6 to lO is the same as that set -forth in the machine first described-that is to say, a seam will fbe formed in which each stitch is composed of three superposed coterminousl stitches,- or, in other words, is a triple stitch.

1. In a sewing-machine, for sewing a seam each stitch of which is composed of three coterminous stitches, an nnderlthread mechanism,fa vertically-reciprocating needle, means to impart lateral movements to said needle infthe direction of the feed, and. means to feed the material inone direction only and only during the formation of the last `stitch of the triplet.

2. In a sewing-machine, the combination of an under-thread mechanism, a gate, means to oscillate said gate to impart lateral motion to` the needle in the direction ofthe feed, a needle-bar mounted in said gate and i movable withit and having a needle, means to reciprocate said needle-bar,and meansto hold the let.

material being sewed against advancement during the formation of two coterminons stitches, and to advance it during the forma` tion of-a third stitch coterminous with the rst two.

3.' Inl a sewingsmachine, a stitch-forming mechanism including a reciprocating needle, a needle-bar, and an oscillating gate in which saidA needle-bar is carried, and by which the needle-bar is given a lateral movement in the direction of the feed to form a seam each of whose stitches is composed of three coterminous stitches, combined with a feed mechanism, and means to operate it to feed the material invone direction only and only during the formation of the third stitch of each trip- 4. In a sewing-machine, for sewing seams each of whose stitches is composed of 'a triplet of coterminous stitches,a stitch-forming mechanism comprising agate, a needle-bar having a needleimounted in said gate, means to reciprocate said'needle7 means to oscillate said gate for two consecutive stitches while the needle is out ofthe material and to oscillate iton the third stitch while the needle is in the material, andimeans cooperating with `the needle while in the material during the formation 'of the third stitch to feed the ma'- terial.

In testimony whereof I have hereunto set C. N. WORTHEN. 

